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Relation between Magnetism and Electronic Structure of 3d-Metal Alloys in the Stoner Theory and in the DSFT

  • ELECTRICAL AND MAGNETIC PROPERTIES
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Abstract

We study the dependence of magnetic properties: Curie temperature, mean and local magnetic moments—on the type of crystal lattice and average number of d electrons per atom. The problem is considered in two approximations: with spin fluctuations not taken into account, in the Stoner mean field theory, and with spin fluctuations taken into account, in the dynamic spin fluctuation theory (DSFT). In the DSFT, we obtain an analogue of the Slater–Pauling curve for the mean magnetic moment at finite temperatures. Numerical results in the DSFT are in qualitative agreement with experiment: with magnetic phase diagram and dependence of magnetic moment on concentration in ferromagnetic alloys.

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ACKNOWLEDGMENTS

We are grateful to the reviewers for the useful comments.

Funding

The work was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (theme “Quantum” no. 122021000038-7).

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Correspondence to N. B. Melnikov.

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Melnikov, N.B., Gulenko, A.S. & Reser, B.I. Relation between Magnetism and Electronic Structure of 3d-Metal Alloys in the Stoner Theory and in the DSFT. Phys. Metals Metallogr. 125, 49–55 (2024). https://doi.org/10.1134/S0031918X23602275

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